Big Brakes - 14 Inch Rotors Wilwood Calipers

[bryson]

That's rad!

Forgive me if I missed this in earlier discussion, but why not machine it to be a slip-on style rotor rather than the bolt-through style? It would certainly take more material to do that way, so maybe that's reason enough (I'm sure the material is $$$...)?

 

[1FZj80]

The material cost is actually fairly minimal. It is about $55 for a 1.500" disc of 6061 to make each hat.
The hat design shape and mounting is based primarily on the results of the load calculations and the goal to maintain a ridged connection between the brake rotor and wheel hub. My hat is about 1.200" offset between the rotor and hub and has a thick cross section. I suppose you could design a large offset hat that allowed the rotor to be slip-on over the hub, but I would suspect it would have much more deflection under load and there would be no real benefit. Removing the hub is easy. It might be possible with a floating rotor due to the mounting method.

 

[AcroSteve]

Has anyone tried running these 355 rotors and calipers with 17" wheels?

Method 305 if it matters

 

[AcroSteve]

Has anyone tried running these 355 rotors and calipers with 17" wheels?

Method 305 if it matters

Considering the components and engineering done by 1FJ80, I have a thought regarding 17" wheels.

Given the fact that there may be enough clearance, but not knowing until we have made the investment and tried it, I need a way out if the caliper rubs the wheel.


The solution to the caliper rubbing is to move it towards the centerline.

I belive its as simple shortening the round standoffs on the wilwood adapter, or the ones like 1FJ80 made. Depending on the amount, maybe some clearance for the caliper. Keep in mind I'm only picturing .125 to .25 inches, given the comments of it being very close.


Well, the rotor is in the way. Ok. Turn the O.D. of the rotor down the corresponding amount.

Ok, effective fiameter if the caliper is now small enough to avoid rubbing the wheel.

But does it interfere with the 9.19" hats?

Solution...
Wilwood offers 14" rotors with the 8.25" bolt pattern. Just initially buy or make the smaller hats and the 14x8.25 rotors which are actually about $30 cheaper each than the 14x9.19".

I believe the 1" smaller inner diameter on the back side won't be an issue.

Perhaps Mark has a comment on that?

 

[AcroSteve]

Problem...
The 12x8.25 on 6x5.5 hats aren't available in .81 offset.

0.941 is what I'd have to work with. Or start with. on a positive note, they are also cheaper by about $100 each.

I'd either have to modify the mounts or the hats. Wilwood doesn't have a drawing of that one online, but perhaps there's enough material in them that .131 could be removed and get back to the .810 offset. Probably would be better just to change the dimensions on the caliper adapter brackets or use spacer washers.

Either way, a workable solution...

 

[PIP]

I've designed a lot of automotive stuff.

I can totally get behind building hats and caliper mounts to trick out your brakes with performance parts.

However

My advice is when you're doing something like this and it's coming down to shaving a little bit off several bits and dealing with 1/16" clearance between moving suspension stuff- No. You're forcing something to happen that just isn't meant to work and you need to go back to the drawing board.

Keep up the good work! Nice work 1FZj80!

 

[1FZj80]

If you are going to spend the time and $$ to go to a 14" rotor/caliper upgrade, I would recommend using a wheel that fits. Either hat bolt pattern will work. it is more of a fitment issue. you can't go too far inboard or else the rotor hit the knuckle bolts and too far outboard and the caliper may interfere with the wheel. I agree with PIP, removing material off several bits to make it fit is not a great design approach.

 

[lelandEOD]

...I'm seeing way too much awesomeness in this thread for these to not come to market. What's the plan? Are these going to be available as kits or as individual [customer finishes it] adapter parts?

 

[AcroSteve]

Can't answer your questions, but I'll tease you a little.

Factory rotor next to the wilwood. And 17" steel wheels. But 18s would be better. We've got aluminum Method 305 on it and the stickon weights inside don't leave much room between the calipers. I could see rocks and mud maybe knocking off a weight.

 

[AcroSteve]

sorry for the blurry pic.